Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf80a5b7f1fcb46…

MALICIOUS

PDF

82.1 KB Created: 2020-12-09 17:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0e4e3534c12e5d9936d0e6af5323fc65 SHA-1: 177d58dc78a27dc0a269007794519d446f0c5c1b SHA-256: 0bf80a5b7f1fcb463e70531f52beb7c3c50cb8e492fc7ec9996c52050c619b61
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?utm_term=answer+in+german+language In PDF document text
    • https://bufazojilenove.weebly.com/uploads/1/3/4/6/134639622/8166953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461791/normal_5fc3f8551f2ff.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/b87bbdf551.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd05b82c6de34c7a3a034c/1606223290457/74370333153.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57aff3de5e49b55b764c/1606375344156/house_on_mango_street_book_cover.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3dad334513fae413385/1606218717783/historia_de_la_iglesia_catolica_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/56965743759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e012ae0-2354-4f35-a4ab-61d9b82cc0e2/o_evangelho_por_emmanuel_cartas_de_paulo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27b7e60f2895dc1f1e23b/t/5fc8270a8bd7793567463c86/1606952716107/2344974867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92fc82ef-44ab-4722-84c1-f14f6e1ce144/gm_tech2_diagnostic_scanner.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 3872 bytes
SHA-256: 6adc15bd54e154fd810b33fb22b285d7232fd3aeb7cae4b3b51b7f894cb8132d
font_01_sfnt_off0000d8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 5084 bytes
SHA-256: 0b8195ab2473db14fb00fdb16689ab9e518eafab2537f6feda77e8c13c2aeeb0
font_02_sfnt_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 5892 bytes
SHA-256: ec0bda47f29cfe9ffbf6e63edf18fb9222262f9c767c043b6bd404aadaba1837
font_03_sfnt_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 13460 bytes
SHA-256: eb5a9bc9213dd3af9d51c0a04cc78aa105090ef2b727ebf836a5bf0c25a36c6a
font_04_sfnt_off00012243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12243 16964 bytes
SHA-256: 65b2e599d411b3073c2cf46b02fa19e75a90f12726faf8820465d4bd73ef9ff9

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